World’s Oldest Piece of Fossilized Skin Is Discovered in Oklahoma Cave
A skin fossil smaller than a fingernail is making big waves for the information it may give about the development of vertebrates. The sample was discovered in Oklahoma's Richards Spur, a vast limestone cave system. While these caves are rife with fossils, finding fossilized skin is quite rare. And this fossil, which is described in Current Biology, is at least 21 million years older than previously discovered skin fossils.









































































